*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    background-color: #e1e1e1;
    font-family: sans-serif;
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
}

.key{
    border:1px solid #999;
    background-color: #eee;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
    padding: 20px;
    font-size: 20px;
    font-weight: bold;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    min-width: 150px;
    position: relative;
}

.key small{
    font-size: 14px;
    color:#555;
    position: absolute;
    top:-25px;
}
